Chapter 12. Adding Signatures and Security
You can digitally sign PDF files to approve a document or even track changes to a document. You can certify Adobe PDF files to attest to the validity of the contents of the file. You can also protect your Adobe PDF files by applying security that limits who can access your documents and how users can manipulate the contents of your files.
In this lesson, you’ll learn how to do the following:
Create a digital ID that uses an image.
Digitally sign documents.
Verify a digital signature.
Certify a document.
Apply password protection to a file to limit who can open it, and apply a password to limit printing and changing ...